R. I. KHRAPKO. Study on Classical Electrodynamics Spin. Research Trends and Challenges in Physical Science Vol. 1, [S. l.], p. 129–158, 2021. DOI: 10.9734/bpi/rtcps/v1/4052F. Disponível em: https://stm.bookpi.org/RTCPS-V1/article/view/3616. Acesso em: 4 jun. 2026.